Vibration massage instrument.



VIBRATION MASSAGE INSTRUMENT,

APPLICATION FILED acne, 1915.

1,175,262. PaIenIedMar. 14,1916. Y

C Hemze.

Irv/@Mor A lVoIfney.

111e COLUMBIA PLANOGRAPH co., WASHINGTON. D. cv

UNiTED sTATEs PATENT oEEioE.

CONRAD HEINTZE, 0E BERLIN, GERMANY, ASSIGNOR T0 THE FIRM OE ELEG'.l.RICI'IIT'LS-A GESELLSGHAIETY SANITAS M. B. H., 0F BERLIN, GERMANY.

VIBRATION MASSAGE INSTRUMENT.

Specification of Letters Patent. Patented M2211', 14, 1916.

Application filed October 8, 1915. Serial No. 54,862.

To all whom t may concern: A

Be it known that I, CONRAD HEINTZE, engineer, a subject of the King ofPrussia, and residing at l5 Holsteiner Ufer, Berlin, (Srermany, have invented certain newy and useful Improvements in Vibration Massage Instruments, of which the following is a' specification.

The present invention relates to a vibration massage instrument in which the vibrating body or applicator, performing a rotary pendulating movement, is journaled in a ball joint. lVith other known instruments -of this kind the ball of the ball joint is journaled in a corresponding spherical metallic dish. In such case, owing to rapid Wear caused by the high speed, a loud noise will very soon appear, which renders the instrument unsuitable for its purpose. For this reason the dish has been lined with leather, but this results in very high frictional resistances, which form a heavy load for the driving motor, which, for instruments of this kind, should be constructed as light as possible.

According to the present invention, with the object of reducing. frictional resistances as well as noises to a minimum, the bearing part of the vibration body is, at the rear, elastically supported by means of a spring of smal] initial tension acting contrary toV prevent all knocking of tliispart if, in consequence of its having worn, it no more bears closely against its guide surfaces at the sides.

In the accompanying drawing a constructional form of the invention is exemplied.

The lever a, to the outer end of which a massaging tool b is fitted, is formed intermediate its ends with a ball c forming its bearing part; this ball is housed within a cylindrically bored sleeve Z which is closed by a cap e. At its rear end the said lever is formed with asecond ball f which engages in an eccentric cylindrical bore it in the crank head g fitted to the shaft of the driving motor m. In the sleeve cl is disposed a conicallyV Wound spring c which, at thek one end, bears against the bottom of the said sleeve d, at the other end against the ball c. By the action of spring /c the ball will be held up against the seat lin cap e, when the instrument is running idle, or, in other words, when no pressure is acting on the tool b. Asv the spring k has, however, a small initial tension, the friction caused thereby will be very small. Vifhen, however, the tool b is applied with pressure against a part of the body, the ball c will be displaced against the action of spring vlo, in such a manner, that it is lifted off the seat in cap e, s0 that no gliding friction whatever will occur at this point. The Ventire pressure will .be taken up by the spring c, but neither here any7 gliding friction will be caused, as the oscillations of the spring will be taken up by elastic deformations. There will be only a small friction between the surface of the ball c and the cylindrical inner side of sleeve d. This friction is, however, immaterial, because the frictional sur.- faces in question onlv act as guides and do not receive the working pressure.

Owing to almost absolute absence of all gliding friction and to its being replaced by elastic and thus energy returning deformations of the sprirg, the instrument will consume but very little power; furthermore the wear will be very small` so much theA more as the wear whichwill occur on the cylindrical surfaces of the'bores of sleeve d and the crank head g, respectively, will be distributed, in consequence of the elastic journaling, over comparatively wide circumferential bands.

I claim:

Y applicator.

s rin in the absence of a massafrinv res-` sure; a cylindrical guiding,` surface for said ball; a driving shaft; a crank on said shaft; aY cylindrical bore in said crank; and a :ball

at therear end of saidapplicator lodged` in said bore.

3. In avibration massage instrument, the

combination of anapplicator comprising a ball; a conically Wound spring of small initial tension bearing against said ball in a Copies of this patent may be obtained for ve cents each,l by addressing `che Commissioner of Patents, i

directionopposite to the *massaging pres- -suregwa-bear1ng surface on lwhich said ballv Washington, D. IC. 

